quantax.symmetry.ParticleHole

quantax.symmetry.ParticleHole(eigval: int = 1) → Symmetry

Particle-hole symmetry for fermion systems.

Parameters:

eigval –

An integer specifying the symmetry sector. The meaning of each number is

• 1: Eigenvalue 1 after particle-hole inversion

• 0: No particle-hole inversion

• -1: Eigenvalue -1 after particle-hole inversion